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Time left 0:40:38 Question 1 Not yet answered Marked out of 27.00 Question #1[27 marks] (35 minutes + 6 minutes for uploading A disc of a diameter D = 100 mm, and thickness of 10 mm, has a surface temperature of 290°C and emissivity s =[0.X]. The disc is oriented horizontally and subjected to a cooling process in quiescent, ambient air and large surroundings for which To - Tsur = 30°C. Neglect the heat transfer at the bottom and the side of the disc. a) Calculate the rate of heat transfer from the top surface? [14 marks] b) Will the disc cool faster or slower when it is oriented vertically, explain mathematically? [7 marks) c) Check the situation whether the convection is forced, natural or mixed convection in case the disc is subjected to moving air with a velocity of 3 m/s. [6 marks] Hint: X= last number of your ID Flag question Maximum file size: 250MB, maximum number of files: 3 - Files You can drag and drop files here to add them. CINCILATTEMADT